This question is from trigonometry topic – trigonometric ratios on complementary angles
We have to prove that cos80°/sin10° + cos59°cosec31° = 2
RS Aggarwal, Class 10, chapter 12, question no 4(ii)
Share
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
LHS
cos80°/sin10° + cos59°cosec31°
=cos80°/sin(90°-80°) + cos59°cosec(90°-59°)
= 1+1
=2 = LHS